Hanna Instruments HI 504901 - Manual (Page 28)

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tion will be given by the interface:
LED Status Meaning
SMS enable (green) blinking Cellular phone
SMS disable (red) blinking error
When this error occurs, the instrument will try repeatedly to
initialize the cellular phone engine and the error will be
disactivated only after a successful initialization.
Note If SIM card expired or maximum number of remaining mes-
sages reached zero, the only way to disactivate cellular error
is to recharge or substitute the SIM card.
While cellular error is active no remote configuration and PC
communication session can take place until error will be
disactivated. Also SMS service is not available.
BATTERY TEST FAILURE
HI504901 can test the internal backup battery in order to
check if it is good and correctly connected on the main board.
Interface performs the battery test at device start-up and once a
day at 15:00 (3:00 pm).
If battery test is not successful, then an alarm SMS is submitted
by HI504901 supervisor to the programmed number(s) as
described on the “SMS delivery” section. Also repeated SMSs
are sent if no user confirmation is received.
Note Every day, after this test procedure, related alarm SMS for bat-
tery test failure will be submitted by the interface even if an user
confirmation was received the day before (if there is still prob-
lem with internal battery). The only way to prevent alarm SMS
sending is to solve the problem related to the internal battery.
While battery problem persists green “SMS enable” and red
“SMS disable” LEDs are in the following conditions:
LED Status Meaning
SMS enable (green) blinking Battery test failed and
SMS disable (red) ON SMS sending enabled
SMS enable (green) ON Battery test failed and
SMS disable (red) blinking SMS sending disabled
Note Before removing battery or checking its capability, make sure
that the HI504901 is turned off.
Note Even if a battery problem persists, all HI504901 functions
are still available.
FAULT CONDITIONS & SELFTEST PROCEDURES
HI504901 is provided with some selftest procedures to pre-
vent interface problems. The below fault conditions may be
detected by the software:
• EEPROM data error
• Cellular phone error
• Battery test failure
If a problem is found, HI504901 gives to the user a “vi-
sual” indication through green and red LEDs for SMS sending
enable/disable (also for battery test failure an alarm SMS is
submitted to the programmed number(s)).
EEPROM DATA ERROR
EEPROM data error can be detected through automatic
EEPROM test procedure. HI504901 performs this test at start-
up and once every hour.
When an EEPROM data error is detected (i.e. if a checksum
control fails), HI504901 tries to repair the corrupted data. If
it does not succeed, a fault alarm is generated for EEPROM
corruption error. To close this error a new local interface con-
figuration is required.
As soon as an EEPROM error is detected, the following “vi-
sual” LED indication is provided by the interface:
LED Status Meaning
SMS enable (green) ON EEPROM data
SMS disable (red) ON corrupted
Note While EEPROM data error is active no polling operation is
performed. Remote PC communication and remote interface
configuration can not take place. Only a local PC configu-
ration is allowed in order to let the user to verify EEPROM
stored data and to correct the corrupted ones.
CELLULAR PHONE ERROR
During the normal functioning of the interface if a problem
occurs in communication with the cellular engine, a cellular
error will be switched on. HI504901 performs periodically (every
10 minutes) a cellular test to be sure that the cellular phone
engine is ready and network registered. Moreover, a cellular
error can be generated if the SIM card expiration date is reached
or when the number of remaining messages reached zero.
If cellular error is active, the following “visual” LED indica-